Question

Calcule a distancia entre os pontos A(-2,3) e B(1,5).

Answer 1

$distancia = \sqrt{(B_x - A_x)^2+(B_y-A_y)^2} \\\\distancia = \sqrt{(1-(-2))^2+(5-3)^2} \\\\distancia= \sqrt{(1+3)^2+(5-3)^2} \\\\distancia= \sqrt{4^2+2^2} \\\\distancia = \sqrt{16+4}= \sqrt{20}$